Rubber-like substance and process of making same.



BStUEEEEt-LEKU SUBSTANCE AND IIQGCEEK.

' h l, 1932, Serial No, 380,989.

we xiii-sari Stun; "he United ci icons of t @rleans, in the par- :3 no of liniisiana, 1 useful improvebstonoes and. Prooor ing is a llS invention relates nlilier-lilie snbol'? (i V b which is emstic, re Ill, tough and. 10118, of h1g1 lens-lie s ongth o l (lure ity, l1

latent .lCtiOil, oils,

other S01 \"PIll'S, anal. capable of use for many n'le tor" rubber, poran clactic filler for the inner atic :1 object of the invention is to )roviule s process of making rubber-like snbst: of that general class formed of golatin, v ccrin cln'oinolcs, out which, unlike p .lOi compositions of this clmractcr, Will not harden by oxidation or continued use, but will retain a sliion-lilre resiliency ticnlo. N tubes of pne for on imlefimte period of time, o tlesioeratom in the use of the composition 1' Lire filler or for any purpose where a. continuous elasticity or U; ilicncy is require In can"; our invention into practice, on first l'llSSl: c ozs. of connnercinl gelatin in 5 nice, by weight, of pnrc Water. and then iltltl thereto 5 0245;. of gly sin. '1. his mixture is heated to about 150 F. anti cooked While being well bllL'l'Wl for about}; hr. To the .niixlurc thus prepzuieil is lhcn znlolccl 1 oz. of .Lml plaster, which then cooked and stirred well. for another .1 lir. To illC mixture is then :uhlecl 014. sul'i urimil linserxl oil, free "1 sit; or, and the mixture heated to for itllUtllQl po iocl of luz, after n the composition is completed by the n lition of :1- oz. sodium). (licliromzite. mixed 111. 2 02. black strap molasses, the whole being rapirliy stirred and thoroughly mixed, when the composition ready r51- nse.

In the production. of substitute rubber goods or articles of, any liiIKl, the composition is poured into molds, or ii it is to be r nsecl as a fillQl ijor 'tll'a tubes 1t 15; forced into the tnbe by comprcssetl air, hydraulic pres sure, or the action nip or screw. the llljllll dug; cl under at pressure or from to i .RKIN, 0.? NEW QELEENS, LUUISIANA, ASSIGNGIfi-S, -L 351 T53, .90 Cl-iARLES W. BENEL HG'EF,

"o the clmr- Q1 IVIAKING $AME.

Ztencwefl November 2'1, 191/). Serial actor the article to be mo tlcil, and the to heat for it composition then snbjectcr period of from 4: to hrs. at temperature of from 150 to 254 it. according; to the Clo-- gree of firmness of texture and resiliency which it is desired to obtain.

The lead plaster acts as a binclcr securing perfect cohesion of the particles and gives tensile strength and toughness to the mass, and in this composition also n'mintains the insolnbility and elasticity of the glyocrin and chrome salt combination ancl increases tho resistance of the product to moisture and Water. The sul'fnrizccl linseed. oil, free from free sulfur, cooperates with the lcncl plaster to maintain the product in n perm: ncnl'ly elastic and resilient state, (incl prevents it from oxidizing 117ml hardening when exposed to the atmo phere or from continued use, in which respect the composition (li ters nmlerially from the usual combinations of gelatin, glycerin and chronistes, which harden or disintegrate more or less rapidly from oxidation and ago. While other (lllGll'lO compounds may be nsecl, so- (linin dicln'on'mlo is prelcrrecl. Soilium (lichromzrte, nnlilic cliromate of p sh or oiclnroina'iie of potash, commonly n. ,l in other processes, gives all the csults of the two former, but unlike them it rcn (ll-01's the proclnct practically free from the eficcts of ater and moisture n'licn employed in the combination. 11ml under the method of manufacture above described. The glycerin gives elasticity and resiliency to the mass, while the molasses, or its substantial equivalent, acts as o. solvent for the cln'onmte andv as a retzu'alrr (o restrain the setting of the sub stan e umlcr the action of the chi-ohmic to n. ;-;nlli(-.icnt degree to enable it to he I iiccrcl into tho tire in a. fluid condition. By (lissolving the gelatin in water and glycerin, instead of, as usual, simply softening the gelatin in Water or steam and Wholly clriying oll the moisture when the glycerin 15 added thereto, suflicient moisture is retained in the product to limit its hydroscopicity to a. desired degree. The product produced by our process also has very high tensile si'renz l'h, resists lie-it, friction, oils and benzin or othcr solvents to high degree, and retains its: res liency fan on indefinite period :rlcr continucal service, which renders it value lil pneumatic tires,

(Lil

Practical demonstration has shown that an though filled with air, and is further suili ciently elastic that it may by suitable means be transferred from one tire casing to another without injury. Another advantage of the product is that the lead plaster and.

sulfurized linseed oil control and modify the elasticity or resiliency of the mass so asv to render it of peculiar value as a tire filler, in that the tire is made sufficiently fast or resilient to absorb shocks or jars without reacting or rebounding suddenly enough to transfer vibratory motion to the vehicle, thus overcoming a well-known objection to air-filled tires or fillers of high resiliency.

The sulfurized linseed oil employed in our composition is obtained by treating linseed oil with sulfur-chlorid in the proportions of Y one part by weight of sulfur-chlorid to ten parts of linseed oil. A larger proportion of sulfur-chlorid may be used to secure a harder product, and the proportions of the other ingredients may be modified to a certain extent according to the degree of density, re-

siliency and tenacity which it is desired to secure. In place of linseed oil any other similar oil of the fatty group may be employed. Having thus described the invention, what we claim as new is 1. The herein described process of producing a rubber-likesubstance, which consists in preparing a mixture of gelatin, Water and glycerin; heating said mixture; then adding 'ed plaster to said mixture and heating the same; adding sulfurized linseed oil free from free sulfur to the mixture thus produced and further heating the same; and finally adding a chrome salt to the mixture, substantially as described.

2. The herein described process of producing a rubber-like substance, which consists in preparing a mixture of gelatin, Water and glycerin; heating said mixture; then adding lead plaster to said mixture and heating the same; adding sulfurized linseed oil free from free sulfur to the mixture thus produced and further heating the same; and finally adding sodium di chromate to the miXture,and again heating the same, substantially as described.

3. The herein described process of producing a rubber-like substance, which consists in first combining under the action of heat a mixture of gelatin, water and glycerin; then adding lead plaster and heating again; then adding sulfurized linseed oil free from free sulfur; and finally adding a chrome salt, and heating the mixture while under pressure, substantially as described.

4. The herein described process of producing a rubberdike substance, which consists ducing a rubber-like substance, which qonsists in dissolving gelatin in Water, incorporating glycerin therewith, stirring and heating the mixture, adding thereto lead plaster and sulfurized linseed oil free from free sulfur while still stirring. and heating the mixture, then adding sodium dichromate dissolved in molasses, and then heating the mixture.

6. A rubber-like compositioncomposed or the following ingredients and in substatitially the following proportions by weight glycerin, five ounces; water, five ounces; gelatin, five ounces; lead plaster one-half an ounce; sulfurized linseed oil free from free sulfur, one-half an ounce, and an alkali metal chromate, one-fourth of an ounce.

7. A rubber-like composition composed of the following ingredients and in substantially the following proportions by weight glycerin, five ounces; water, five ounces; gelatin, five ounces; lead plaster, one-half an ounce; sulfurized linseed oil free from free sulfur, one-half an ounce; and sodium dichromate, one-fourth of an ounce.

erin; adding lead plaster to said mixture and further heating the, same; addin furized linseed oil free from free sul ur to said lead plaster and mixture; and adding an alkali metal chromate to the mass thus produced, substantially as described.

10. The herein described processof producing a rubber-like substance whlch consists in preparing under the actlon of heat a suitable plastic mixture containing gelatin and glycerin; adding lead plaster to said. mixture and further heating the same;

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adding sulfurized linseed oil free from free sulfur to said lead plaster and mixture; and adding an alkali metal chromate to the mass thus produced dissolved in a medium capa ble of retarding the setting of the said mass; substantially as described.

11. The herein described process of prolaster end snlfuriz'ed linseed oil free from ree sulfur whereby' an action is created tending to prevent the mass from oxidizing and hardening, substantially as described.

' '12. A rubber-like, composition of the charaster described containing lead plaster and sulfurized linseed oil free from free sulfur tending to prevent said composition from oxidizing and hardening, substantially as described.

13. A rubber-like composition of the char acter described containing gelatin, glycerin, lead plaster and sulfurized linseed oil free from free sulfur tending to prevent said composition from oxidizing and hardening, substantially as described.

14:. A rubbenlike composition oftlie cherecter described contaiinng an alkali metal chromatmlead plaster and sulfnrized linseed oil free from free sulfur tending to prevent said composition from oxidizing and hardening, substantially as described.

In testimony whereof we allix our signetures in presence of two witnesses.

HARRY A. CLARK, EDWIN J. LARKIN.

Witnesses:

CAMILLE MAssoN, FLoRENon FLYNN. 

